Su-57, however, is fighting against Ukraine [COMMENT]

Theoretically part of the 5th generation, the Su-57 multirole aircraft is being utilized in the war in Ukraine, but to a limited extent, due to the fact that the precedence for the Russian air force is to avoid losing it, the British Ministry of Defence said on Monday. Russia's tactics of usage seem understandable, although it does put into question the capabilities of Russia's latest aircraft.